Memory Game The Endocrine SystemOnline version Review the organs of the endocrine system and their functions. by Kathy Dilliplane Adrenal Glands Pituitary Thymus Helps the immune system recognize and fight pathogens Produces melatonin to regulate sleep cycles Thyroid Testes Regulates the female reproductive system Regulates growth and metabolism Regulates blood sugar levels Regulates calcium levels in the blood. Increase heart rate during a "Fight or Flight" response The body's "Master Gland" that controls the other endocrine organs. Pancreas Pineal Gland Regulate the male reproductive system Ovaries Parathyroid Glands